Ok, I'm trying to measure the amp on the cable going to my P4 that I want to run 24/7. The first time I did it I did it without reading the manual, and it may or may not have shorted that time (it did ...

Today’s complex electrical and electronic systems on heavy-duty trucks require a surgical approach to troubleshooting, some cutting-edge tools — and a great deal of skill. Are you up to speed?